Berkeley Supernova Ia Program: Data Release of 637 Spectra from 247 Type Ia Supernovae

Abstract

We present 637 low-redshift optical spectra collected by the Berkeley Supernova Ia Program (BSNIP) between 2009 and 2018, almost entirely with the Kast double spectrograph on the Shane 3~m telescope at Lick Observatory. We describe our automated spectral classification scheme and arrive at a final set of 626 spectra (of 242 objects) that are unambiguously classified as belonging to Type Ia supernovae (SNe~Ia). Of these, 70 spectra of 30 objects are classified as spectroscopically peculiar (i.e., not matching the spectral signatures of "normal" SNe~Ia) and 79 SNe~Ia (covered by 328 spectra) have complementary photometric coverage. The median SN in our final set has one epoch of spectroscopy, has a redshift of 0.0208 (with a low of 0.0007 and high of 0.1921), and is first observed spectroscopically 1.1 days after maximum light. The constituent spectra are of high quality, with a median signal-to-noise ratio of 31.8 pixel${}^{-1}$, and have broad wavelength coverage, with $\sim 95\%$ covering at least 3700--9800~Å. We analyze our dataset, focusing on quantitative measurements (e.g., velocities, pseudo-equivalent widths) of the evolution of prominent spectral features in the available early-time and late-time spectra. The data are available to the community, and we encourage future studies to incorporate our spectra in their analyses.

arXiv comment22 pages, 9 figures, accepted for publication in MNRAS

References in corpus (75)

• Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
• Measurements of Omega and Lambda from 42 High-Redshift Supernovae
• Maps of Dust IR Emission for Use in Estimation of Reddening and CMBR Foregrounds
• Measuring Reddening with SDSS Stellar Spectra and Recalibrating SFD
• The Complete Light-curve Sample of Spectroscopically Confirmed Type Ia Supernovae from Pan-STARRS1 and Cosmological Constraints from The Combined Pantheon Sample
• The Supernova Legacy Survey: Measurement of Omega_M, Omega_Lambda and w from the First Year Data Set
• A 2.4% Determination of the Local Value of the Hubble Constant
• Large Magellanic Cloud Cepheid Standards Provide a 1% Foundation for the Determination of the Hubble Constant and Stronger Evidence for Physics Beyond LambdaCDM
• Improved cosmological constraints from a joint analysis of the SDSS-II and SNLS supernova samples
• New Hubble Space Telescope Discoveries of Type Ia Supernovae at z > 1: Narrowing Constraints on the Early Behavior of Dark Energy
• The Hubble Space Telescope Cluster Supernova Survey: V. Improving the Dark Energy Constraints Above z>1 and Building an Early-Type-Hosted Supernova Sample
• Accurate photometric redshifts for the CFHT Legacy Survey calibrated using the VIMOS VLT Deep Survey
• SparsePak: A Formatted Fiber Field Unit for The WIYN Telescope Bench Spectrograph. I. Design, Construction, and Calibration
• Improved Dark Energy Constraints from ~100 New CfA Supernova Type Ia Light Curves
• A Precise Distance Indicator: Type Ia Supernova Multicolor Light Curve Shapes
• WISeREP - An Interactive Supernova Data Repository
• Optimal Techniques in Two-dimensional Spectroscopy: Background Subtraction for the 21st Century
• Determining the Type, Redshift, and Age of a Supernova Spectrum
• An Open Catalog for Supernova Data
• Type Iax Supernovae: A New Class of Stellar Explosion
• The diversity of Type Ia Supernovae: evidence for systematics?
• Evidence for a Spectroscopic Sequence Among SNe Ia
• Berkeley Supernova Ia Program I: Observations, Data Reduction, and Spectroscopic Sample of 582 Low-Redshift Type Ia Supernovae
• Comparative Direct Analysis of Type Ia Supernova Spectra. II. Maximum Light
• Improved Distances to Type Ia Supernovae with Two Spectroscopic Subclasses
• The Spectroscopic Diversity of Type Ia Supernovae
• An asymmetric explosion as the origin of spectral evolution diversity in type Ia supernovae
• Fully-Automated Reduction of Longslit Spectroscopy with the Low Resolution Imaging Spectrometer at Keck Observatory
• The Evolution of Early-Type Galaxies in Distant Clusters II: Internal Kinematics of 55 Galaxies in the z=0.33 Cluster CL1358+62
• Fourteen Months of Observations of the Possible Super-Chandrasekhar Mass Type Ia Supernova 2009dc
• The Carnegie Supernova Project I: Third Photometry Data Release of Low-Redshift Type Ia Supernovae and Other White Dwarf Explosions
• Type Ia Supernovae as Stellar Endpoints and Cosmological Tools
• Evidence for Two Distinct Populations of Type Ia Supernovae
• Measuring the Hubble constant with Type Ia supernovae as near-infrared standard candles
• Measuring Ejecta Velocity Improves Type Ia Supernova Distances
• The Foundation Supernova Survey: Motivation, Design, Implementation, and First Data Release
• Spectroscopy of Type Ia Supernovae by the Carnegie Supernova Project
• Measuring Dark Energy Properties with Photometrically Classified Pan-STARRS Supernovae. II. Cosmological Parameters
• Very Early Ultraviolet and Optical Observations of the Type Ia Supernova 2009ig
• The Host Galaxies of Type Ia Supernovae Discovered by the Palomar Transient Factory
• Time Dilation from Spectral Feature Age Measurements of Type Ia Supernovae
• The Very Young Type Ia Supernova 2013dy: Discovery, and Strong Carbon Absorption in Early-Time Spectra
• Exploring the spectral diversity of low-redshift Type Ia supernovae using the Palomar Transient Factory
• Nebular spectra and abundance tomography of the type Ia supernova SN 2011fe: a normal SN Ia with a stable Fe core
• Nebular velocities in type Ia Supernovae and their relationship to light curves
• Nebular Spectra and Explosion Asymmetry of Type Ia Supernovae
• Berkeley Supernova Ia Program II: Initial Analysis of Spectra Obtained Near Maximum Brightness
• Using Spectral Flux Ratios to Standardize SN Ia Luminosities
• Spectroscopic Observations of SN 2012fr: A Luminous Normal Type Ia Supernova with Early High Velocity Features and Late Velocity Plateau
• Using late-time optical and near-infrared spectra to constrain Type Ia supernova explosion properties
• Lick Observatory Supernova Search Follow-Up Program: Photometry Data Release of 93 Type Ia Supernovae
• High-Velocity Features in Type Ia Supernova Spectra
• CfAIR2: Near Infrared Light Curves of 94 Type Ia Supernovae
• The Very Young Type Ia Supernova 2012cg: Discovery and Early-Time Follow-Up Observations
• The Young and Bright Type Ia Supernova ASASSN-14lp: Discovery, Early-Time Observations, First-Light Time, Distance to NGC 4666, and Progenitor Constraints
• Late-time Spectroscopy of Type Iax Supernovae
• Do spectra improve distance measurements of Type Ia supernovae?
• Improving Cosmological Distance Measurements Using Twin Type Ia Supernovae
• Quantitative comparison between Type Ia supernova spectra at low and high redshifts: A case study
• Optical and Ultraviolet Observations of the Narrow-Lined Type Ia SN 2012fr in NGC 1365
• 500 Days of SN 2013dy: spectra and photometry from the ultraviolet to the infrared
• Berkeley Supernova Ia Program V: Late-Time Spectra of Type Ia Supernovae
• Berkeley Supernova Ia Program III: Spectra Near Maximum Brightness Improve the Accuracy of Derived Distances to Type Ia Supernovae
• Type Ia Supernova Spectral Features in the Context of Their Host Galaxy Properties
• SN 2015U: A Rapidly Evolving and Luminous Type Ibn Supernova
• A Definitive Measurement of Time Dilation in the Spectral Evolution of the Moderate-Redshift Type Ia Supernova 1997ex
• The Silicon and Calcium High-Velocity Features in Type Ia Supernovae from Early to Maximum Phases
• On the Progenitor System of the Type Iax Supernova 2014dt in M61
• A unified supernova catalogue
• Early-phase photometry and spectroscopy of transitional Type Ia SN 2012ht: Direct constraint on the rise time
• An Empirical Fitting Method to Type Ia Supernova Light Curves. III. A Three-Parameter Relationship: Peak Magnitude, Rise Time, and Photospheric Velocity
• The Oxygen Features in Type Ia Supernovae and the Implications for the Nature of Thermonuclear Explosions
• Discovery and Follow-up Observations of the Young Type Ia Supernova 2016coj
• Pre-discovery and Follow-up Observations of the Nearby SN 2009nr: Implications for Prompt Type Ia SNe
• SN 2015bp: adding to the growing population of transitional type Ia supernovae

Cited by in corpus (29)

• A Comprehensive Measurement of the Local Value of the Hubble Constant with 1 km/s/Mpc Uncertainty from the Hubble Space Telescope and the SH0ES Team
• SALT3: An Improved Type Ia Supernova Model for Measuring Cosmic Distances
• SALT3-NIR: Taking the Open-Source Type Ia Supernova Model to Longer Wavelengths for Next-Generation Cosmological Measurements
• Peculiar-velocity cosmology with Types Ia and II supernovae
• ASASSN-15hy: an under-luminous, red 03fg-like type Ia supernova
• Can Helium-detonation Model Explain the Observed Diversity of Type Ia Supernovae?
• The Absolute Magnitudes of 1991T-like Supernovae
• Initial Flash and Spectral Formation of Type Ia Supernovae with An Envelope: Applications to Over-luminous SNe Ia
• deepSIP: Linking Type Ia Supernova Spectra to Photometric Quantities with Deep Learning
• Nebular-Phase Spectra of Type Ia Supernovae from the Las Cumbres Observatory Global Supernova Project
• SN 2017cfd: A Normal Type Ia Supernova Discovered Very Young
• Over 500 Days in the Life of the Photosphere of the Type Iax Supernova SN 2014dt
• A Probabilistic Autoencoder for Type Ia Supernovae Spectral Time Series
• Distribution of Si II $\lambda$6355 Velocities of Type Ia Supernovae and Implications for Asymmetric Explosions
• SN 2021fxy: Mid-Ultraviolet Flux Suppression is a Common Feature of Type Ia Supernovae
• A study of Si II and S II features in spectra of Type Ia supernova
• Searching for late-time interaction signatures in Type Ia supernovae from the Zwicky Transient Facility
• SN 2019ein: A Type Ia Supernova Likely Originated from a Sub-Chandrasekhar-Mass Explosion
• SN 2017hpa: A Nearby Carbon-Rich Type Ia Supernova with a Large Velocity Gradient
• The Search for Stable Nickel: Investigating the Origins of Type Ia Supernovae with Late-time NIR Spectroscopy from the Carnegie Supernova Project-II
• Narrow absorption lines from intervening material in supernovae I. Measurements and temporal evolution
• Characterization of Supernovae Based on the Spectral-Temporal Energy Distribution: Possible two SN Ib Subtypes
• $\texttt{HostSub_GP}$: Precise Galaxy Background Subtraction in Transient Long-slit Spectroscopy with Gaussian Processes
• The snapshot distance method: estimating the distance to a Type Ia supernova from minimal observations
• SN 2021hpr: A Normal Type Ia Supernova Showing Excess Emission in the Early Rising Phase
• Normal or transitional? The evolution and properties of two type Ia supernovae in the Virgo cluster
• SN 2017fgc: A Fast-Expanding Type Ia Supernova Exploded in Massive Shell Galaxy NGC 474
• Type Ia supernovae SN 2013bz, PSN J0910+5003 and ASASSN-16ex: similar to 09dc-like?
• Puzzling High-Velocity Calcium Absorption Features Of Type Ia Supernovae